Stop motion for looms



ug 4, 1953 w. J. BUDzYNA Er A1. 2,647,545

STOP MOTION FOR LOOMS Filed Aug. 6, 1949 I5 Sheets-Sheet 1 22 f1 L 67 21I 65 25 :"Gg, P/ Il ,I O im E 'T 5* i 26 l D @D l o Q ,n y Q I 64 l 62wl u 0| HPO@ 'l' III? ,l /l l Il S m Nm INVENToR.

1 19 WALTER .BUDZYN 5B' l BY NAI/PIETER HAMAND g g @47 (www ATTORNEY w.J. BuDzYNA er m. 2,647,545

. STOP MOTION FOR LOOMS Aug. 4, 1953 3 Sheets-Sheet 2 Filed Aug. s, 1949INVENTOR. LTERJ BUDZYNA BY MAURICE R, FLAMAND A TTORNE Y Aug 4, 1953 w.J. BUDzYNA AL 2,647,545

STOP MOTION FOR LOOMs Filed Aug. 6, 1949 5 Sheets-Sheet 3 INVENTOR.y mmmJ BUDZYNA BY MA1/MCE R. FLAMAND Patented Aug. 4, 5719,53

STOP MOTION FOR LOOMS Walter J. Budzyna, East Douglas, Mass., and

Maurice R. Flamand, Central Falls, R. I., assignors to DraperCorporation, Hopedale, Mass., a corporation of Maine Application August6, 1949, Serial No. 109,036

This invention pertains to improvements in lloom stop motions, and moreparticularly, to

16 Claims.l (Cl. 139-353) It is a general object of the invention toproyvide in shuttlel-ess looms or looms of a type adapted to drawfilling from a source of supply not carried by a shuttle, a simple andeffective stop motion adapted to stop the loom either upon failure ofthe mechanism to l-ay the filling in a prescribed manner or upon failureof a warp thread.

It is a further object of the invention to provide a combined fillingand warp stop mechanism, the knock-off actuating mechanism for which isgreatly simplified and which functions through a common linkage to stopthe loom upon failure of either the filling or warp threads.

It is a further object of the invention to provide simple and effectivemeans for stopping a loom of the type described Whenever a fillingthread is broken or fails to be inserted in the shed in a prescribedmanner, and which shall function in a very short period of time as isnecessary with shuttleless looms or other looms of that type whichfunction to insert filling from an external source of supply.

It is a further obj ect of the invention to provide simplified meansadapted to function upon breakage or failure of either the filling orWarp threads in looms of the type described and Which shall set inmotion or vary the position of certain elements which function throughvery accurately timed devices to effect the knock-off function in aprecise, but adjustably timed relationship to the movements of the layand to the movements of the filling carrying instrumentalities.

Further objects will become apparent from the following more detaileddisclosure.

In shuttleless looms and particularly in looms employing flexible tapesor other elements moving inwardly of the shed formed within the warpthreads and adapted to deposit or lay filling from a source of supp-lymaintained at the ends of the loom and beyond the edges of thefafbricbeing woven, the problem of providing a filling stop motion is much moredifficult than in the conventional flyshuttle loom. It is not practicalto,

employ filling feeling forks or other devices at the ends of the shed oradjacent thereto for sensing the presence or absence of the filling asit extends between a shuttle and the warp threads at the shed ends as isthe usual practice.` Stop mechanisms for shuttleless looms must be iadapted to function at a: point within the lshed and further, mustfunction after the filling has been almost completely laid in the shedand after at least a partial withdrawal of the filling carryinginstrumentalities therefrom. Thus the problem is one much more difiicultthan in the conventional loom and must employ devices which functionvery rapidly and yet which must accurately and faithfully sense thepresence of filling without seriously affecting its position or themanner in which it is held within the shed since, if that were tohappen, the finished fabric would show marks resulting from pressure ofthe filling feeling means, that obviously being something which couldnot be tolerated.

The stopping of the loom must be so controlled that the parts alwayscome to rest at a particular point in the cycle at which the fillingcarriers will have been withdrawn from the shed and the harnessesleveled. Therefore the feeler mechanism must act within a very shortperiod of time and set in motion or energize certain other parts forminga portion of the complete stopping mechanism without fail so that theloom may be knocked off with certainty whenever the condition of thefilling or that of the warp threads is such that attention is requiredbefore weaving should continue.

In carrying the invention into practice, filling and warp stop motionsare employed which function largely through mechanical means forknocking off the loom as by disengaging the clutch and applying a brake,The mechanisms, however, function electrically to an extent. The failureof a warp thread or absence of filling in the shed is effective to varya circuit in a manner to energize certain solenoids or 'similarelectrical means for 'positioning certain mechanical elements in thepath of a periodically movable actuator controlled by cams whichaccurately time the point at which the knock off shall occur. The warpstop mechanism parts `of which are of conventional type and theelectrical and other details of which are well known is connected`Within a circuit hereinafter to be described in greater detail andwhich function through a solenoid individual thereto to position adetent in the path of the said moving actuator. filling stop motionwhich is preferably carried by the moving lay and which involves one ormore filling feeling mechanisms employing relatively thin membersadapted to be projected between the warp threads and to descend intocontact with the filling if it is,properly placed, `is interconnected toother periodically moving means which,

" upon failure of the feeling means to contact a The properly laidfilling thread, functions to actuate certain switch means or otherelectrical devices Within the circuit which then control a similarsolenoid or other electrical relay device such as may position a similardetent Within the pathway of the moving actuator and will then initiatethe stopping movement which, in properly timed relationship to movementof the loom parts, knocks 01T the loom as will hereinafter be described.

The invention will be described in following paragraphs by reference toone preferred embodiment thereof and certain modiflcationsthe disclosureand illustrative drawings being .given by Way of example of apreferrediorm Which-the invention may take.

In the figures of drawing:

Fig. 1 is a perspective view of the right hand end of a shuttleless loomto which the'invention has been applied, this View showing certaindetails of the .general .arrangement of. the .parts and `the generalmannerinwhioh the stoppingmeans has been appliedthereto.

Fig..2 is an enlarged perspective viewof some ofthe stopmotionmechanismwhich forms a part ofthe more inclusive showing ofI Fig. l.

Fig. 3, is a front elevation of one end of the lay and showing partofthe center fork movement lapplied thereto.

Fig. 4 is a. section taken through apart of the loom and showing themechanism of Fig. -3 as seen from a different viewpoint.

Fig. 5 isa detail viewfshowing to anl enlarged scale the centeriork;switch contacting means illustrated in .Figs 3. .andi

Fie. 6 is a frontelevation of the mechanism hQWIl. il! Figlf 5- Fie.. 'lis. @detail View of a cam, Atrom. which the Cent r tors movement isderived.

El 8 is an. end. view of: the cam-shown in Fie. '1.

.Fig- 9` isa detail View of the centeriork cam.

Fig. 10 is anend view lofvthe cam of Fig. 9 and show-ine the v.angulardisposal of the operative sumerge-thereof whichensaee an arm attached toand used forswinging the-center fork Lines to their dierent Positions.

Fig. l1 is a plan view of the stopmotion actuator- 'lever cams showingangular disposal and other details thereof..

Fie., v12l is. a section taken through the vertical center 1in oi Fie-1.1 and-further' illustrating details/Orth 'cams hewn therein..

Fig. 13 is; a wiring diaeramshowine an electr-ical. Qiruit Wheh maybeemployed..

Now referring to Fig. l, the. generalarrangement parts which .enter intothey combination will be. brierly described. One Iloom to which thestop1 motion may .he applied is herein illus.- trated, although it .isto be understood that .the invention .appl-ies to conventional looms and-to all typesv of. shuttleless .looms .such as ,needle loom's, loomsernploxlzingflexiblel tapes to introduce the filling, .or to loomsemploying other filling carriers which may be projected through .theshed, .but which receive. `thefiil-li'ng tofbe inserted Vfrom anexternal 'source of Supply' and therefore, in most instances, layllng inlengthsY which are not continuous.

The vloom may have loomsides and other structural parts. within which'are adapted, ,to

function theA various loom mechanisms including a let-off (not n) but bywhich warp threads geherallvidesiguated by numera1 2|y 4are drawnthrough heddle. .echanisms `2 2v .operated im any conventonalma ner.and. afabrictake-.upmeaiis (not shown) The filling maintained as astationary, outside source of supply and herein located within acontainer 23, one of which is to be found at each end of the loom. isdrawn therefrom through a conduit 24 and is so controlled by iillingmotions generally indicated by numeral 25 andvvvhich need not bev'described jin detail here, is carried 'into and drawn across the shedto be laid therein as independent or individual picks Yof filling in amanner understood by those conversant with this art. The particularmeans for introducing the filling comprises at either side of the loom,a flexible tape 26 adapted to be projected into and withdrawn from theshed by an oscillating tape Wheel 21 enclosed Within a casing 2B andactuated by means including a system oi gearing (not-shown).

At one end of the machine a driving motor 29 is mounted'upon a suitablebracket and is connected through a clutch and gearing to drive a maincam 'shaft 30 from which .other parts are .driven or moved 1in timedrelationship and in proper synchronism with the various functionalparts, thereby to carry out-the weaving steps vin a prescribed manner.Reference is hereby made to co-pendingapplication Serial No. 71,622,filedJanuary 19, 1949, now U..S. Patent No.- 2,604,123, and wherein aloom similar to that herein described is more fullydisclosed.

The stopping of the loom iseffectedupon breakage `:of a Warpy thread orupon failure of the filling inserting mechanismproperly to insert a pickof filling. Within the shed. As shown in both 'Figs. 1 and 2,the actualknocking` off or stopping of the loom is effected through a moving.actuator lever 3'! pivoted at.32 on a bracket or other-support memberSaand normally urged by means of a spring,r 3,4 insuch-direction that afollower 35 at the free end thereof 'is lcaused to bear with adenitepressure against the innersurface of a cam disc 36er upon certaincamsvl or 38 thereon, the function of these cams being explained ingreater-detail hereinafter. ,The cam disc 36 also carries a third camnumbered 39 projectingfrom the-otherwise. circular-.periphery thereof,this cam bearingadeflnite spaced y:relationship to the cam 31. By meansof a locking `screw dii, theposition of the disc I35 and'its attachedparts may be angularly varied asa whole. The cam 38 isxed to thediscr bymeans of a threaded vprojecting stemy 4i passing through as1ot-42in thedisc and adapted t0 be lookedin `position bythe nut 43. Thus cams31andv39may be angularly adjusted throughout a reasonable extentr andcam 38 may be. similarly/moved'angularly independently thereof.

These parts aremounted upon'the continuously rotatingcamfshaft 30 andthus make one complete revolution every time a .pick of filling isinserted. Itis .tov-*be understood that the parts just describedvanvdthose which, as vhereinafter described, function `therewith may beattac-hesite and A,may be operated by any other moving shaft or elementWithin the machine which may be conveniently employed. The principlesofoperation rwill remain ,the same.

The. lever al. lvvhich constitutes a constantly moving actuator car-riesacontactmember 44 in the 'form of an.adjustably positionable lbolt headand igadapted-to bernoved vby the cams and 3.8,. Upon failure of a `warpthread, or of a lling thread lto v.be inserted properly, the memberldcontactscertain detents 45. or 66 as the latter are moved to or arepermitted toY be moved to agposition in the .pathway of thezcontactvmember 44, Each of the detents is pivoted on a supporting arm 41,detent 45 being pivotedon the pin vor screw 48 and detent `46 beingpivoted similarly at 49. This arm 41 is a part of a clutch control leverlater. to be described. Each of these detents has hooked or otherwiseconnected thereto a link generally indicated by numeral 50 and whichcomprises two hooked wires joined at the center. by an'adjustable clampor otherwise so formedthat, preferably, the length thereof may beadjusted, the other end of said link being hooked to or otherwiseattached within the end of a two-armed lever l pivoted on a cross boltor other pivot member 52 adjacent the top and offset from the center ofa casing 53 within which are housed the coils and other parts includingan. armature or core for the solenoid. The lever 5|,extends to theIother side of kits pivot and has connected thereto a spring shown inFigs. 2 and 13, by means of which the lever and thus the detent arenormally retained in an uppermost position, `or at least, in an inactiveposition with respect to the contact member 44 so that unless one of thestop mechanisms initiates a stopping action, the movement of the lever3| by means ofthe camsabove mentioned is an idle or ineffective one.

Corresponding parts in the other solenoid casing 54 are not numbered andneed not be described since they are identical with, or at least similarto those just described. The two detents 45 and 46 :are thus adapted tobe moved downwardly against the tension of the springs 55 Iwheneverstopping of the loom is initiated, the downward movement thereof beinglimited by a ledge or other stop element 41 which preferably forms apart of the supporting arm 41.

The arm 41, as hereinbefore stated, is actually a part of the clutchoperating fork which is integrally or otherwise formed as a part ofanarm 56 in turn pivoted at 51 and which, in effect, is an extension ofthe curved shifter lever 58, it being understood that both the arm 56and the lever 58 pivot upon the stud or pivot point 51, and that thelever 58, as illustrated in Fig. l, is connected at its inner end to alink 59, the other end of which is connected to one arm of a bell cranklever 66. 'Ihe bell crank lever 66 may rock on a stud 6| iixed in theloomside or in another rigid portion of the machine and, in turn, isinterconnected to the front shipper lever shaft 52 through a link 63which connects at its lower end to the more or less horizontallydisposed arm of the bell crankA lever 60, and at its upper end, to anarm 64 rigidly connected to the shaft 62. Shaft 62 also has fixedthereto the right hand shipper lever 65 and at its Iopposite end, asimilar lever (not shown).

In starting the machine, the lever 65, or that at the opposite end ofthe machine, is merely pulled outwardly thereby moving the linkage justdescribed so that the inner forked end of the'arm 56 is moved toward theend of the machine or outwardly along shaft 3|] to shift a clutchactuating collar which controls the position of certain clutch fingersthereby to engage the clutch for driving the machine. The oppositemovement of the parts permits the fingers to move to a differentposition in which they do not effect engagement of the clutchinterengaging and driving elements. The shipper levers, thel clutchitself and the clutch engaging and disengaging `means form a part ofpractically al1 looms and their construction and `the mode of operationare vwell known tor those skilled in this art. Further descriptionthereof is not necessa here.

The swinging movement of the actuator 3| shifts the parts just abovedescribed in the event that either detent 45 or 46 has been displaced toa position to be engaged` by the contactor element 44. Sincethesedetents are actually a functional part of .the clutch fork including arm56 and the fork extension 41, either of cams 31 or 38 pushing againstfollower 35 and through the intermediary of the contactor 44, will movethe fork inwardly along shaft 3U toward the center of the machine asufficient distance to effect knocking off of the machine by disengagingthe clutch, the interconnecting linkage shown in Fig. l simultaneouslymoving the shipper levers to that position which 'they occupy When themachine is stopped. A brake may or may not be employed, but ispreferable that one be used so that the amount of movement or coastingof the loom after the clutch is disengaged may be more preciselycontrolled and kept near a minimum. Normally a loom of this type mayrotate from about one-half revolution to something approaching arevolution and one-half depending upon the condition of certain elementsand the speed at which the loom is being operated. It is desirable tokeep the coasting movement down to a minimum and also positively togovern the amount Iof travel of the loom after power has beendiscontinued since it is thereby easier to adjust the cams 31 and 38permanently in position and to make -certain that the loom will stopwith the harnesses in very close to a level or centrally disposedposition.

If a brake is employed it may take any one of the forms heretofore foundquite satisfactory for conventional looms since it is merely desired tohave some retarding influence applied as soon as the power or drivingmeans has been disengaged.

Now having described the novel mechanism by which the loom is lknockedoff or stopped when stopping has been initiated at either a Warp stopmotion or a filling stop motion, the latter sometimes being referred toas a center fork if it functions within the lateral confines orintermediate the terminal Warp threads as they are separated to form ashed within which the filling may be inserted, the individual stopinitiating motions themselves will be disclosed. In Fig. 1 a warp stopmotion generally indicated by numeral 66 is supported at the upper partof the rear portion of the loom and, as herein illustrated, ispreferably an electrical type warp stop motion. A complete descriptionthereof is not necessary here since the essential features of that partof the stop motion itself are described and shown in U. S. Patent2,378,895 and involve a series of insulated contact members betweenwhich an electrical connection may be established upon release of anyone of a plurality of so-called drop wires 61, each of which issupported by one of the Warp threads. When a thread breaks or for anyother reason is not present under proper tension, its drop wire moves toa position to establish an electrical contact or connection between thesaid insulated bars and will thereby complete a circuit through to thesolenoid enclosed within the boX 53 and which governs or controls theposition of detent 45 in such a manner as to move itdownwardly againstthe tension of its spring 55 until it is interposed in the pathway o1'the contact member 44, above described. `The stopping of the loom thenmay be completed as thecam 38 which is` employed for the purposeofenligne 'stopping the mechanism 'whenever `a.-vszarp stop is indicated,moves the actuator arm 3| to carry through-its intended purpose.

Itis obvious vthat va` warp thread mayy breakeat anyvtirne or at 4.any.pointin the cycle-of movement of .the loom parts. VInorderwto:prevent-Leompletion of a `warp. stopexceptfbyrthe .cam 11238, that lis,toprevent completion of :a `warpfstop through the cam .31 which,ofcourse, wouldwbe the rst cam to contactcfollowerfl ifi the warp threadhappened 'to iai-1 tust .prior fto fthe .approach .of that l.cam :andafter fcam E18-had passed the follower, the loam yfluadjacent cam 321prevents Athe `detent `45 from-:being drawn downrby the solenoid :until-cam .371 has passedy by follower 35. Cam 39 fholfds :detent E5 inyelevatedfposition whenever lthat cam .underlies .the laterallyproecting wire or extension T68,.Figs. .1.and'2.

'Now referring to Figs. 3,14., 5 andV 6.parts-rof the loom `which aiiectstopping .thereof upon failure `of the tiillingltonbe inserted-'properlywill be described. The lay :movement for .a loom of this typek`comprisesa :lay beamy :69 vcarried-.by swords i Vwhich Aare .pivotedon.a `rook vshaft H adjacent the llower-part of the'loom and, althoughitxforrns no v:particular partof the present invention, this lay beamandthese swords may be-sw-ung'itor and iro in proper-lyvtimedrelationship .by cams AT2 andl on `main learnfshaft 30, Ythese camsfunctioning upon' followers atthe ends vof `the"fork-like-farms lTM andv1v5'vwhiohin turn. are `a part of .the structureto which -the swords FHIare adjustably attached fand' ihy-rrieans of which the :rooking'movementderived from the cams is impartedthroughtothellay str-ucture itself.'That Slay structure preferably includes, finad'ciition-to-the-bearn-=69pa hand-rail and `a :reed .15 forwardly ofvwinch -is disposed a raceplate T-l upon "Whiohare ladaptedfto-besupportedin :theirrnovement into Aand from the shedLiorme-dlbyftheharnessed warpthrea'ds, a tape .and l.tape fheads or .iill-ing .carriersherein generally f indicated by -the :numeral 18, itrbe'ing understood-that allof rvthese parts land-the -particuklari modefof :operationincidental thereto-are thoroughly described in ythe application abovementioned. 1t is also i to fbe understood' that Ithe invention. isv notMa^-t= all l"lirnitede'to ybeing employed invia-loom wherein the layand-parts incidental thereto `and wherein the filling `itself-is`Ainani-pulated by elements such asiherein-show-n and vas described iinthat application -above mentioned.

The --cams 112 and 113-are preferably'of -a -form to ini-party tothe'layfstructure 'an extended Jperiod oi dwell consuming about one-halfthefeornplete cycle incidental to inserting -a-pic'k of filling,=tlreremainder of -the'cams being so `'forrnedasfto move `the -layr in fabeat-up mOVementIduringthe' remainder of the -eycle and aftertheffllingfcarriers have beenrnoved vfrom the `shed yand 4beyond thelayfibeam @"9 which-is,4 of course, long enough to accommodatethe-'maximum width of iabricto be vwoven and to1provide arreasonableamount of additional supportingv surface at either side 'thereof towhich the swords and attendant par-ts may =fbe attached.

The stop motion I devices ythemselves comprise two Vcenter fo-rkassemblies `orrly'one Lof which is illustrated sinceI botharesubstantially 'identical. l-EEach of these -oen-ter forks comprises"a bracket or -holder 119 bolted or Aother-wise attached at lthevv'front side -of the beam 69 and carrying Wvsm--a Lpivot 188 aplurality of i^=tines =or feeler -iing-ers 8i, 'it being :customary toemploy from lthree Sto iive such `ngers, although it vis tobeunderstdythat the number thereof may wary. These ngers attached to pivot '280are 4caused lto lmove :upwardly through the warp threadsv-as-illustratedin Fig. 4 at =a-particular `time during the-cycle, but arefat othertimes maintained in a ldownward position .fwhere they lie within a-slotor indentation Vin .the race .'plate "H, On theirfdownward movement,they :normally 'encounter-:a llingthread which is held between thewarp'threads and maintained sui- `ciently taut tov support the tines 28|.against the 1downward Apull of a "tension spring 82 .attached toa-short arm fixed to pivot 80. The lspring is connected at its other endto ahook 82 'extending outwardly from the lower part 'of the bracket orfrom any 'other convenient fixed element. In the cycle of-foperation:of'these'eenter forks, they are'y moved upwardlyr prior :totheinsertion-of vthe filling, then are-permitted ito'be drawn downwardly:by the vsprings"182.v'vhereupon they :either encounterthe filling iflit 'is Ipresent and' properly laid inthe shed, or are permitted to -dropcleardown zto the recess inthe race plate inthe` event the viilling-isnot 'present and ina prescribed position.

For the purpose of raising the tines, a curved arm 83 forming a part ofpivot 80 lis lengaged by a cam 184 `better shown `iin the-detailviews,Figs. 9 and 10, 4which will presently'ibedescribed. `A second yspring1851s -co'iled about *the ar-m`83 where -it extends outwardly from -thefork pivot and assists in starting the fork downwardly through thewarpsquickly; it also tends to-prevent overthrow as the tines `are v.movedupwardly at a relatively-rapid rate\by=the highest lobe on cam 84.

It is to be understood that-the actuallperiod of time available 'for"feelingtlfie viilling is exceedingly small yand that-the partsfmove ata very rapidrate.

These cams `/lilfone for each centeriork, are detachablyXedv-to sleevesiid-which are fin-turn a-d-justably iixed along the length of a rod 814vreciprocable lengthwise of therlay fbeam 69. This rod' is carried inbearings `rsuch Ias the bearings 188 aty the lower. parte of the'bracketslS-andextends toward one -end oifthe beam`t9;therebyto'terminateina connection by which it lisattachedfoirfoperationbyan upwardly ldirected arrnfof a twoarmedrleverpivoted at vQi)andihvavinga horizontally disposed varnilii the outeriiattened -endf-of which rests upon altappet 192 at theupper end of a'vertically reciprocable'barsBS. This bar is guided adjacent its upperend -in za :bearing F94 connected to 'the swordfli andatits lower endisattached `to asforked `guide. memberfSE :whichfrestrains the .parts-"toaxial movement fsince the forked ends thereof engageateitherfsideorwithiai-:a groove inzafcam hub'v 96 formed as' anintegral partei thecarn 9W, these latter parts'being shown irl-detailinligsg'and 8. The forked'guide member .also supports afiolldweriz whichbears `.upon the cam .97 and which is preferably a roller mounted von .abearing `enifending..outwardly from thesaid iorliediguidel 95. Asprinvg-:Srcompressed between-therlower end Cif-bearing .911 and anadjustable collar lill] normal-1yurges the vertically reciprooablevpartsv just described -inia downward direction or in `such:directionastomaintain engagement between the follower 98 and the cam 91. Inoperationl ofthe loom-the :swinging movement of the :swordlis.accompanied byfa corresponding y'swinging movement offthefreciprocablebar orrflling #fork :actuatorsince both-v arezpivoted orsw'mgable aboutthe .rockshafft vJl The cam 91 and its hub 96 are freely rotatable uponIthe rock shaft and are driven by a chain which passes about a sprocket02 the hub of which is fixed to cam shaft 30 and about a similarsprocket designated by numeral |03 and fixed to the hub of the cam 91.

Now referring to Figs. 9 and 10, the cam 84 which is adapted to controlthe movement of the center fork tines 8| and also to prevent movement ofrod 81 to its fullest extent in one direction whenever filling is notproperly present in the shed, comprises a more or less level or inactivesurface |04, a notch and an inclined, elevated portion |06. These camsurfaces function to control the center fork feeler tinesand to set theparts controlled by the shaft 81 to initiate stopping as describedgenerally in United States Patents 1,865,930 and 2,378,240. The'topmostpart |00 of the cam engages beneath the arm 83 angularly disposed withrespect t-o the pivot 80 for the center fork tines, and thereby elevatesthe tines to the position of Figs. 3 and 4 whenever the cam 91 liftsfollower 98 to move the bar 93 vertically upwardly and, through thelever arms 9| and 89, push the rod 81 to the left against the tension`of a spring |01 engaged between the bearing 88 and an adjustable collar|01', all as shown inv Fig. 3. It is to be understood that two centerfork assemblies are preferably provided and that the rod 81 extendsfurther to the left thereby to control the second center fork motion inprecisely the same manner that'it controls the center fork herein shown.It is not necessary to show both where the additional showing wouldmerely involve duplication. The cam surfaces |04, |05 and |08 areinclined as shown to provide a better bearing for the arm 83.

The extent of the raised portion of cam 91 is shown in Fig. 8 and it isthroughout that angular Dart of the cams rotation that the center forkis held in its elevated position. Upon further rotation of the cam 91,the rod 81 is permitted to return to the right, Fig. 3, under theiniiuence of spring |01, and the tin-es 8| are then permitted to fallunder the influence of springs 82 and 85, that particular part of themechanism being more fully illustrated in the U. `S'. Patent 2,378,240,the tines moving downwardly as the karm 83 follows the contour of thecam surface |08 until they rest upon the filling providing that fillingis present in the shed as it should be. In that position, the arm 83 isarrested before `it moves down into the notch |05 so that the returnmovement of the cam 84 with rod 91 fails to eifect engagementl betweenthe point |08 and the arm 83, so long as filling is present beneath thetines 8|. do fall to a lower position and the arm 83 may be brought torest on cam surface |04, but that occurs during the beat-up and after'the point |08 of the cam 84 has passed the arm 83 in the movement of theparts'toward the extreme right hand j position. l

In the event filling is not present as the tines 8| move downwardly,they are not arrested as above described and fall into a depression orgroove in which they are disposed beneath thenormal surl face of therace plate 11, and simultaneously,the arm 83 follows the surface of cam|98 down to an elevation beneath the point |08 of the cam at thel lefthand side of the notch i05. That then arrests themovement of the rod 81inits returnto4 the right for a sufcient period of time for the stoppingcycle incidental to .set in motion.

New referring to a 4 Sansa the ver suing failure to se The tinestically'disposed arm 89 which swings to and frol with the rod 81 and cam84 has projecting therefrom in a forward direction, a contact finger|09. This finger |09 moves between extreme positions as indicated bydot-and-dash lines, Fig. 5, but when upon lling failure, the cam 84 isarrested by presence of the arm 83 in the notch |05, the parts aretemporarily positioned in the full line position of Fig. 5, so that uponthe forward or beat-up movement of the lay, this nger |09 engages aplunger ||0 of a microswitch or other switch generally indicated bynumeral and which forms a part of the stop motion circuit hereinafter tobe described in greater detail by reference to the diagrammatic View,Fig. 13. When filling is laid in the shed in a normal manner, the arm 89and contact finger |09 return to the full right hand position, and, inthat position, there is no effect upon the microswitch so that the onlypossibility of engagement between the finger andthe plunger or otherpart of the switch adapted tochange its effect upon the flow of currentin the circuit takes place when the cam 84 and rod 81 i the circuit inwhich they function. Current from` any convenient source is introducedto a primary |4 of a transformer, the secondary |5 of which is groundedat one side at I6 and connects through to the stop motion circuit at itsother side, such connection being effected through a switch I1. Thisswitch |1, not shown in any of the other' views, is preferablypositioned beneath the left hand knock-off lever so that an extensionthereof may operate the switch to throw the current off or to open thecircuit whenever the loom is stopped. Then upon restarting the loom thesaid extension on the knock-off lever, or any other satisfactory controlmeans for the switch, will reset it thereby to close the circuit and tointroduce current to the various parts thereof, it being understood thatthe circuit which is grounded is not completed until one or the other ofthe stop mechanisms functions.

At the warp stop motion side of the circuit one through the switch 1, itbeing understood that switch ||1 is normally closed when the loom isrunning.

The other solenoid 54 which controls the position of its detent inaccordance with filling conditions present at the lay as indicated bythe center forks is also energized from the secondary I5 through switch1 and the conductor illustrated. The other end of the coils of thatsolenoid is connected to a ground through switch |||,'that is,

themicroswitch, which is tripped only when one 11V of the center forksfails tosense the presence of filling at the lay in proper position:preparatory to beingbeatenv into the warp. It ybecomes evident that uponthe downward movement of' a drop wire 61 orupon tr-ipping and closingvthe microswitchY ||I, that the appropriate solenoid at casings -3 or'54will beenergized thereby mov-ing thecorrespending detent 125 or 43downwardly, the loomv andithe lobe 38 made adjustable in the samemanneras has-heretofore beenv described w-ithr-espect to the cam 36, thesimple cam disc here being replaced by a cup-shaped member I I-having ahub I Il'attachable and adjustable by means of a set screw to the shaft30,01"l otherappropri ate rotating element uponv which the camy may beAcarried. 1n order to shorten the extending wire' BEY-and tofrender'theaction of camv 39'- whichcorresponds to cam 39, Fig. 2, more precise anddiv rect,- the said cam 39 isA formed at the inner endI of acylindrical-extension. |25 which mayform an integral or attached partofthe disc H8'. Thisv cylindrical portion |20 also-= serves toJ enclosevto some extent the cams3'I, 38 and the-follower 35 which functionstherewith. InFig. L1. the various` angular extents of cam surfaces whichhave=been found to functionfquite satisfactorily in-.actual practicehave been designated as and; applied .to the several cams. thesefiguresl are illustrative of one embodiment of the inventiony which`has` been employed in. actual practice, and: are not atV alltlimitingsince under different designs for'the mechanism: the timingof certain ofthe parts may be variedto an extent and therefore the actual-vgures`hereby given by-way of example would necessarily-vary accordingly.

The form of the invention shown and described to this point involveselectrical` contact beingA made Yat some point whenever awarp-threadbreaks or filling fails to be inserted'properly,`

that electrical contact initiating the` movement of certain mechanism.which eventually causes the loom to stop. It is to be understoodthat theinvention may be modified in .such manner as to convey the initialvimpulse or movement of parts -which is incidentalto failure ofa. warpthread or filling to be inserted. properly bymeans` That which is whollymechanical inrnature. means, not hereinl described, wouldtake the-`place of the circuit which includes contact. means, switches, .andlsolenoids energized upon completionof oneof the circuits, andsuchmechanical devices would then move the detente |'v or 46, as thecase might be,.into position to be engaged by the contact element 44 onthe continuously moving actuator arm 3|. Whenever `that 0ccurred, theloom would be stopped in the same manner as hereinbefore described.

Operation During normal operation of the loom thefwarp threads aremaintained under sufficient-tension to hold each of the drop wires i'lyinv uppermost position in which event no contact -is made :at the: warpstop motion side ofthe circuit so' that It is to be understood ythat 12the solenoid enclosed within casing 53 is not energized and the detentis thereforeI held by means of spring 55- in an upper, or, at least, inan inactive position. Detent 46 is likewise maintained in' a positionwhere it cannot be engaged by the contact member 44 which. of course, isperiodically moved vunder the action of cams 3'I and 38. Whenever a warpthread fails or for any other reason, one of the drop wires 61 falls,contact isv made within that part of the circuit which is utilized forenergizing the solenoid at 53rso-that the warp stop side of themechanism immediately tends to function for drawing the lever 5|downwardly to position the detent in the pathway of the moving actuatorcontact member 44. In the event the cam 31 has just passed by the,follower 35, the action of the solenoidis immediately completed and cam38, when it does engage follower 35, pushes the clutch actuating forkinwardly asabove describedthereby to disengage the clutchv parts and,through the levers 35, 58,5!!and interconnecting linkage, Fig. l., thecompletion. of the loom knock-off is completedso that the brake, if abrake is employed, will be set thereby tostop the loom more quickly. Atthat same time or during the movement just above described, theswfitch II'I, Fig. 13, is thrown toopen position to discontinue flow of currentin the circuit throughout the entire stop motion circuit.V

In the event the initiation of the stopping movement due to breaking ofa warp thread occurs before the cam 31 had passed by follower 35, thecam.39 functions yto elevate or to mainvtain'in .elevated` position thedetent 45 through its engagement Ybeneath theextending wire arm |58.`That assures that the warp stop will not be completed` through the cam.31 which is actually onlyfor the purpose. of-effecting stoppingindicated at the centervfork'or through the filling stopping-devices.

Inthe event filling fails to be inserted properly, such failure being`due to breaking thereof, displacement of the filling along the lay forvarious reasons.. or for. any other reason of which there maybe several,the tines 8| move downwardly after the inserting movement of the fillingcarriers and just after they have been withdrawn so that there shall beno interference between the tinesand said carriers, the movementdownwardly of these tines as permitted by the receding or sloping partofthe cam.v 84 continues until the arm. 83 enters the notch |05. At thattime the tines` not heldupwardly byv the filling which .shculdbeVpresent fall into a slot on. the raceway,

as above described.. The constantly actuated rod SIthen is preventedfrom making acomplete return movement as follower 98 is permitted to belowered by cam 91, that causing the contact finger |09 to be halted orarrested temporarily in an intermediate position as indicated in Figs. 5and 6. takes place justas the lay advances forwardly to effectbeating-up of thelling and therefore f finger |09 eventually contactsthe switch actuator The actual filling feeling movement.

is always timed to the movement of the loom parts so that the drawingdownwardly of the detent 46 by the solenoid at 54' occurs just prior toapproach of cam 38 or in about the position at which the parts are shownin Fig; 2, therefore there is no possibility of the filling stopindication being completed to stop the loom by anything other than cam38 which is expressly designed and adjusted for that purpose. Theknock-off of the loom parts includes throwing out the switch H1 so thatin either a warp stop or lling stop, the entire stop motion circuitbecomes dead and remains so until the loom is again started and switchH1 closed as the shipper lever 65 or that at the other end of the shaft62 is pulled outwardly or otherwise moved to what is its active or loomrunning position.

To start the loom again after repairing the fault for which it wasstopped, it is only necessary to pull the lever 65 or similar controllever to operative position; that then engages the clutch through thepositive linkage, disengages the brake, if one is used, and closesswitch H1.

This description has made mention of shuttleless looms wherein the picksof filling are inserted from each side. In certain instances filling maybe inserted from one side only.v The stop mechanism functions in thesame general manner in either case.

The moving actuator has been shown as of the pivoted or swinging type.It may conveniently be provided for movement of other nature, e. g., onein which the actuator slides in a rectilinear or other pathway. It maybe positively controlled in each direction of its movement, or may bespring returned.

While one embodiment of the invention has been disclosed, it is to beunderstood that the invention concept may be carried out in a number ofways. The invention is, therefore, not to be limited to the precisedetails described, but is intended to cover all variations andmodifications thereof falling within the spirit of the invention and thescope of the claims.

We claim:

l. In a stop motion for a loom, a periodically moving actuator, a meansto disconnect a source of power from the loom, a detent pivotallymounted upon said 'means to disconnect the source of power from the loomand movable transversely to the directions of movement of said powerdisconnecting means to and from a position between the moving actuatorand the means for disconnecting the source of power so that movements ofthe actuator are conveyed through to the means for disconnecting thesource of power when said detent occupies a position between the saidparts, and thread sensing means effective upon sensing an abnormality inthe condition of the thread, to move said detent -into said positionbetween the moving actuator and means to disconnect power from the loom.

2. In a stop motion for a loom, a periodically moving actuator, a meansto disconnect a source of power from the loom, detents movable to andfrom a position between the moving actuator and the meansfordisconnecting the source of power from the loom, means for sensingthe condition of warp threads and other means for sensing the presenceor absence of filling properly inserted in the shedy means for normallyholding said detents out of a position in which they would be engaged bysaid moving actuator said sensing means being operable upon indicatingan abnormality in either the warp threads or in the filling for movingthe detent affected thereby to a position in the path of `said movingactuator thereby to stop the loom` upon a succeeding stroke of themoving actuator. y

3. In a stop motion for a loom, a periodically moving actuator, a meansto disconnect a source of' power from the loom, detents movable to andfrom a position between the moving actuator and the means fordisconnecting the source of power from the loom, a circuit comprising asource of current, solenoids, one for one of said 'detents and anotherfor the other of said detents and warp thread sensing and filling threadsensing means each of which is effective upon a solenoid within thecircuit for varying its respective solenoid to move the respectivedetent controlled thereby into the path of the moving actuator.

4. In a stop motion for a loom, a periodically moving actuatorcomprising a pivoted arm, a contact surface and a follower at the freeend of said arm, a cam means engageable with said follower,

a means to disconnect a source of power from theloom comprising amovable member aligned with said contact surface but out of range of themovement thereof, a detent movable to and from a position between thecontact surface of the moving actuator and the means to disconnect thesource of power from the loom, and thread sensing` means effective uponsensing an abnormality in the condition of the thread, to move saiddetent into a position between said moving actuator and the means todisconnect power from the loom, whereby on the next `following movementof the actuator by said cam means, the power for the. loom will bedisconnected therefrom.

5. In a stop motion for a loom, a periodically moving actuatorcomprising a pivoted arm, a contact surface and a follower at the freeend of said arm and a cam means constantly rotatable and engageable withsaid follower for moving the actuator throughout a limitedangular'extent, a means to disconnect the source of power from the loomcomprising a movable member aligned with said contact surface butdisposed out of movement thereof, a detent supported adjacent said meansfor disconnecting the source of power and movable to and from a positionbetween the contact surfaces of the moving actuator and themeans todisconnect the source of power from the loom, said` detent having athickness such that when moved toa position between the moving actuatorand means for disconnecting the source of power, further movements ofthe said actuator affect the said means to cause it to disconneet thesource of power from the loom, and thread sensing means effective uponsensing an abnormality in the condition of the thread, to move saiddetent into a position between said moving actuator and the means todisconnect the source of power from the loom.

6. In a stop motion for a loom, a periodically moving actuatorcomprising a pivoted arm, a contact surface and a follower at the freeendof said arm and a cam means constantly rotatable and engageable withsaid follower for moving the actuator throughout a limited angularextent, a means to disconnect a source of power from the loom comprisinga movable member a part of which is aligned with said contact surfacebut disposed out of range of movement thereof, detents supportedadjacent said means for disconnecting the source of power and movable toand from a position between the contact surfaces of the moving actuatorand the means to disconnect the source of power from the loom and havinga thickness such'that whenl moved to a position betweenlthe'movinigi"actuator and means for disconnectingthe source -ofr power,further movements of the said actuator affect the said means toicausesit'zto disconnect the source of .power from the -1loom,: and threadsensing means `including warp zthread .sensingzandy filling threadsensing devicesfeachf of which is. effective uDOIl Sensing anabnormality vin tsrespective thread for movingfoneof :the said detentsinto a position betweerrtlfe,moving actuator and the means to disconnectthe L source of power from the loom, whereby on Lthe'next followingmovement of the aictnaton'bysa-id'` cam; means, the loom will loeknockedzoff andstopped.

- "L Infafstop motion for a loom, a constantly rotating shaft,aperiodically moving actuator comprising apivoted arm, a cam means fixed'to saidishaft and `a wfollower at the free end of said armandengageable byzsaid cam means,`a clutch engaging and releasing means onsaidshaft, a knock-off lever including an armand fork engageable withsaidv releasing means,v said moving actuatorbeing movable by said cammeans to an extent insufficient toaifect the said arm and fork, and-Jadetent positi'onable `between said `fork and movinglactuator and ofsuchthickness as to impart. movementofthe actuator to the fork andclntch'engaging and'releasin'g means to knock on and stopthefloom..

8j- Ina stopnmotion `for a loom, a periodically moving'actuatorcomprising a pivoted arm, a contact surfacel and a follower at the freeend of said armand a-cam'means engageable with said follower, a meanstodisconnect a source of power from` the loom4 comprising ya movablemember aligned with said lcontact surface but out of range ofimo-vementthereof, a plurality of detents pivoted 4'formovement upon vsaid meansfor disconnectimgV the source ofpower and :movable to and from :aposition between the contact surface of the'moving actuator rand a partof the means to disconnect the source of power from the loom opposite tosaid contact surface and of such thicknessthat when moved tosuchposition between the contact surface of the moving actuator and thesaid part of said means, further movements of the actuator under theinfluence of said cam means causes a corresponding movement of the meansfor disconnecting the source of power, a circuit comprising a source ofcurrent, solenoids,y one `for 'each of'said detents',-warp threadsensing `means-in said circuit and interconnected therein-'forenergizing one said solenoid, filling thread sensing means likewiseforming a part of saidcircuit and so disposed therein that upon failureof filling thread to be inserted properly withinthe fabric, that thesolenoid in that part of'the circuit controlled by said filling threadsensing means shall'be energized, said solenoids being so disposed andso connectedwith respect to said detents thatupon energization thereof,the said detentsr are moved into alignment with the contact surface ofthe moving actuator.

9. In. a stopv motion for a loom, a constantly rotatinglshafhaperiodically moving actuator comprising a pivoted arm, a cam means fixedto said shaft and a follower at the free end of said arm and engageableby said cam means, said cam meansfcomprising a disc-like member, camsfixed thereto and angularly spaced, one of which functions.- to'impart`- movements incidental to stoping-,upon failure of the warpthreadand the other. of which-governs stopping movements resulting. uponfailureoffilling to. be inserted properlyf a clutch engaging andreleasing means on' said shaf.taknock-oif Alever including an arm andAfork engageablewith said releasing means, said moving actuatorbeingvmovable by said cams tor any extent insufficient .to contact and vaffectthe said armand fork, detentspivoted to said knock-off `arm and forkmeans and yhaving portions .thereof whichare-engageable by said movingractuator Awhen thel saiddetents are movedA to aiposition'in alignmentwith the saidsactuator, said detents being Oia/thickness such that'wheninterposed betweensthe actuator and the fork, movementsof `theactuator'are conveyed through the detent to the 'fork and vthereby vto,the engaging and releasing means and interconnections therefrom to thesaid detents formoving them. from anormallyinactive position to'one invwhich they-are interposed between themoving actuator and the -forkwhenever an abnormality inthe condition of the :threadis indicated.

l0. In a stop motion'for-afloom, a constantly rotatingshafh a.periodically moving actuator comp-rising apivoted arm, a cam means fixedto said shaft-and a'iollower'at the free end ,of said arm engageablebyfsaidzcam means, `an adjustable contact memberatthe said free end ofthe arm adjacent the'follower, said cam vmeans comprising a disc, camsattached to the side of said disc'adjacent the followerv and alignedtherewith; said cams being `angularly spaced', a clutch engaging andreleasing mea-ns slidable along said shaft, a knock-off lever includingan arm and a fork engageable `withzsaid'slidable releasing means, saidmoving-'actuator being movable by said cam means to an extentinsufficient '.to affect the said 'arm and-:.fork, an extension `to said1fork and detents pivoted ateither end of said eXtension and having.Contact portions at their ends which terminate ad-jacent the centralportion of said extension-and4 in alignment withthe said contact memberof said moving actuator when moved to an `activefposition, said detentsbeing of such thickness that: when'movedto active position and contactedby said moving actuator, the'extension and'forlr'willl be moved todisengage the clu-tch andy tovk knock off the loom, resilient meansnormally maintaining said detents in afposition outof range of saidmoving actuator, stop motion devices associated withthe warp threadsand-with the filling threads and means interconnecting saidl stop motiondevices to said` detents for moving them .against the said resilient:means toa position to be engaged by themoving` actuator upon anindication of failure at any one of the warp threads or failure of afilling thread-to be properly inserted.

l1. Mechanism as defined in claim 10, wherein one ofthe said camsattached to the cam disc is employed for movingthe actuator to completestopping of the loom whenever a warp thread failure is indicated'and theother said cam is employed'for similarl37 stopping the loom upon failureof filling thread-properly to be inserted, anda camadjacent the said camwhich effects stopping upon failure of filling, an extension on thatdetent controlled through the warp thread stop indicating means, saidextension being engageable with said cam to maintain the detent out ofrange of the moving actuator during passage of the said cam whichcontrols stopping upon failure of filling thereby to prevent stoppingofthe loom-when awarp thread failure is indicated,v except by the camspecificallyintended.

12. In a stop motion for a loom having a rock shaft and a lay includinga lay beam and swords pivotecl at said rock shaft, a center forkcomprising filling thread feeling tines, cam means effective to swingsaid tines through filling feeling and indicating movements, a shaftmovable lengthwise of said lay beam to which said cam means are fixedand by which they are moved, and means for periodically reciprocatingsaid shaft comprising a cam rotatably mounted on said rock shaft, meansfor rotating said cam, a bar guided for movement substantiallylengthwise of one of said swords adjacent said cam on the rock shaft, afollower on said bar and in contact with said cam, and means interposedbetween said shaft and bar and supported upon the lay sword forimparting movements of the bar to the shaft.

13. In a stop motion for a loom having a rock shaft and a lay includinga lay beam and swords pivoted at said rock shaft, a center forkcomprising lling thread feeling tines, cam means effective to swing saidtines through lling feeling and indicating movements, a shaft movablelengthwise of said lay beam to which said cam means are fixed and bywhich they are moved, and means for periodically reciprocating saidshaft comprising a cam rotatably mounted on said rock shaft, means forrotating said cam, a bar and means for guiding said bar in substantiallengthwise alignment with one of said swords, fork means at one end ofsaid bar engageable with means adjacent said cam on the rock shaft formaintaining alignment of that end of the bar with the shaft butpermitting reciprocation of the bar, a follower carried by said bar andfork means and engageable with the cam whereby reciprocatory movementsare imparted by the cam to the bar, a swinging lever means carried bysaid sword and connected to the shaft and engageable by the bar forimparting movements thereof to the shaft.

14. In a stop motion for a lo-om having a rock shaft and a lay includinga lay beam and swords pivoted at said rock shaft, a center forkcomprising filling thread feeling tines, cam means effective to swingsaid tines through filling feeling and indicating movements, a shaftmovable lengthwise of said lay beam to which said cam means are fixedand by which they are moved, and means for periodically reciprocatingsaid shaft comprising a cam rotatably mounted on said rock shaft, meansfor rotating said cam, a bar and means for guiding said bar insubstantial lengthwise alignment with one of said swords, fork means atone end of Said :bar engageable with means adjacent said cam on the rockshaft for maintaining alignment of that end of the bar with the shaftbut. permitting reciprocation of the bar, a follower carried by said barand fork means and engagea-ble with the cam whereby reciprocatorymovements are imparted by the cam to the bar, and means for impartingmovements from the bar to the shaft which comprises a lever armconnected to the shaft, a second lever arm movable with the first andengageable by that end of the bar adjacent thereto, spring means forreturning the shaft in one direction, the connection to the lever andbar being such that movement is imparted to the lever by the bar in onedirection only.

15. In a stop motion for a loom having a rock shaft and a lay includinga lay beam and swords pivoted at said rock shaft, a center forkcomprising filling thread feeling tines, cam means effective to swingsaid tines through filling feeling and indicating movements, a shaftmovable lengthwise of said lay beam to which said cam means are fixedand by which they are moved, and means for periodically reciprocatingsaid shaft comprising a cam rotatably mounted on said rock shaft, meansfor rotating said cam, a bar guided for movement substantiallylengthwise of one of said swords adjacent said cam on the rock shaft, afollower on said bar and in contact with said cam, and means interposedbetween said shaft and bar and supported upon the lay sword forimparting movements of the bar to the shaft, a switch means throughwhich a circuit controlled for stopping the loom, and a contact ngercarried by said means for imparting movements of the bar to the shaftfor affecting said switch means when the means for imparting movementsof the bar to the shaft and the shaft are stopped in an intermediateposition.

16. In a stop motion for a loom having a source of power connected foroperation of the loom through clutch means, a periodicaily movableactuator and means functioning upon said clutch means to disengage itthereby to disconnect said source of power to knock olf the loom,detente movable to and from a position between the moving actuator andthe clutch disengaging means for imparting movements of the actuator tothe clutch disengaging means, a circuit and warp and filling threadsensing means forming a part of said circuit and effective upon sensingan abnormality in the condition of the thread, for completing saidcircuit, and electrically operated means connected to Said detents forselectively moving one of them in response to the warp and fillingsensing means to interpose it in the pathway of said moving actuator.

WALTER J. BUDZYNA. MAURICE R. FLAMAND.

References Cited in the le 0f this patent UNITED STATES PATENTS NumberName Date 1,865,930 Lindsjo July 5, 1932 2,300,098 Brooks et al Oct. 27,1942 2,355,609 Stuer Aug. 15, 1944 2,378,895 Brown June 26, 19452,437,406 Rogers Mar. 9, 1948

